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Hudson S, Barwood M, Low C, Wills J, Fish M. A systematic review of the physiological and biomechanical differences between males and females in response to load carriage during walking activities. APPLIED ERGONOMICS 2024; 114:104123. [PMID: 37625283 DOI: 10.1016/j.apergo.2023.104123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 08/11/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023]
Abstract
The purpose of this review was to systematically assess literature on differences between males and females in the physiological and biomechanical responses to load carriage during walking. PubMed, CINAHL, Scopus, Web of Science and the Cochrane library were searched. A total of 4637 records were identified and screened. Thirty-three papers were included in the review. Participant characteristics, load carriage conditions, study protocol, outcome measures and main findings were extracted and qualitatively synthesised. Absolute oxygen uptake and minute ventilation were consistently greater in males but there were limited sex-specific differences when these were expressed relative to physical characteristics. There is limited evidence of sex-specific differences in spatio-temporal variables, ground reaction forces (normalised to body mass) or sagittal plane joint angles with load. However, differences have been found in hip and pelvic motions in the frontal and horizontal planes, which might partly explain an economical advantage for females proposed by some authors.
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Affiliation(s)
- Sean Hudson
- School of Human and Health Sciences, University of Huddersfield, Huddersfield, United Kingdom.
| | - Martin Barwood
- School of Health, Sport and Life Sciences, Leeds Trinity University, United Kingdom
| | - Chris Low
- Carnegie School of Sport, Leeds Beckett University, Leeds, United Kingdom
| | - Jodie Wills
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia
| | - Michael Fish
- School of Human and Health Sciences, University of Huddersfield, Huddersfield, United Kingdom
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Kloss EB, Niederberger BA, Givens AC, Beck MS, Bernards JR, Bennett DW, Kelly KR. Quantification of daily workload, energy expenditure, and sleep of US Marine recruits throughout a 10-week boot camp. Work 2024; 77:1285-1294. [PMID: 38489209 DOI: 10.3233/wor-230554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND During periods of high-volume vigorous exercise, United States Marine Corps recruits often experience musculoskeletal injuries. While the program of instruction (POI) for basic training is a defined training volume, the total workload of boot camp, including movements around the base, is unknown. OBJECTIVE The present study aimed to quantify the daily total workload, energy expenditure, and sleep during basic recruit training at Marine Corps Recruit Depot (MCRD) San Diego. METHODS Eighty-four male recruits from MCRD San Diego wore wrist wearable physiological monitors to capture their complete workload (mileage from steps), energy expenditure, and sleep throughout the 10-week boot camp. RESULTS Marine recruits traveled an average of 11.5±3.4 miles per day (M±SD), expended 4105±823 kcal per day, and slept an average of 5 : 48±1 : 06 hours and minutes per night. While the POI designates a total of 46.3 miles of running and hiking, the actual daily average miles yielded approximately 657.6±107.2 miles over the 10-week boot camp. CONCLUSION Recruit training requires high physical demand and time under tension due to the cumulative volume of movements around base in addition to the POI planned physical training.
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Affiliation(s)
- Emily B Kloss
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
| | - Brenda A Niederberger
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
| | - Andrea C Givens
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
| | - Meghan S Beck
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
| | - Jake R Bernards
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
| | - Daniel W Bennett
- pplied Translational Exercise and Metabolic Physiology Team, Warfighter Performance, Naval Health Research Center, San Diego, CA, USA
- Leidos, Inc., San Diego, CA, USA
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Gill N, Hollands K, O'Leary TJ, Roberts AJ, Greeves JP, Jones RK. The effect of sex, stature, and limb length on the preferred walk-to-run transition speed. Gait Posture 2022; 98:1-5. [PMID: 35994952 DOI: 10.1016/j.gaitpost.2022.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/05/2022] [Accepted: 08/11/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND The preferred walk-to-run transition speed (PTS) for healthy adults is approximately 2 m∙s-1, however, PTS is influenced by anthropometric factors. Yet despite known sex differences in anthropometrics, studies have reported no sex differences in PTS. RESEARCH QUESTION Do stature and limb length affect PTS in the same way for both male and female healthy adults? METHODS Thirty-seven (19 female) non-injured adults volunteered for this study. Participants completed a walk-to-run transition protocol, where the treadmill speed was increased from 1.2 m∙s-1 to 2.2 m∙s-1, in increments of 0.1 m∙s-1 every two minutes. An independent t-test compared PTS between sexes. Multiple regression analysis determined the effect of sex and stature and sex and limb length on PTS. RESULTS Female participants transitioned at a lower PTS than male participants (1.8 (0.2) m∙s-1 versus 1.9 (0.1) m∙s-1; p ≤ 0.026). Sex and stature explained 19% of the variance in PTS, while sex and limb length explained 21% of the variance. Including interactions increased the variance explained by 23% and 2% for sex and stature and sex and limb length, respectively. The significant interaction between sex and stature showed PTS was inversely proportional to stature for male participants but directly proportional for female participants. SIGNIFICANCE These findings suggest that the extent to which stature and limb length influence the preferred transition speed may differ between sexes.
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Affiliation(s)
- Niamh Gill
- Centre for Health Sciences Research, University of Salford, Manchester, UK.
| | - Kristen Hollands
- Centre for Health Sciences Research, University of Salford, Manchester, UK
| | - Thomas J O'Leary
- Army Health & Performance Research, Army Headquarters, Andover, UK; Division of Surgery & Interventional Science, UCL, London, UK
| | - Andrew J Roberts
- Army Recruit Health & Performance Research, Army Recruit & Initial Training Command, Upavon, UK
| | - Julie P Greeves
- Army Health & Performance Research, Army Headquarters, Andover, UK; Norwich Medical School, University of East Anglia, Norwich, UK
| | - Richard K Jones
- Centre for Health Sciences Research, University of Salford, Manchester, UK
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O'Bryan SM, Connor KR, Drummer DJ, Lavin KM, Bamman MM. Considerations for Sex-Cognizant Research in Exercise Biology and Medicine. Front Sports Act Living 2022; 4:903992. [PMID: 35721874 PMCID: PMC9204149 DOI: 10.3389/fspor.2022.903992] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/17/2022] [Indexed: 12/15/2022] Open
Abstract
As the fields of kinesiology, exercise science, and human movement developed, the majority of the research focused on male physiology and extrapolated findings to females. In the medical sphere, basing practice on data developed in only males resulted in the removal of drugs from the market in the late 1990s due to severe side effects (some life-threatening) in females that were not observed in males. In response to substantial evidence demonstrating exercise-induced health benefits, exercise is often promoted as a key modality in disease prevention, management, and rehabilitation. However, much like the early days of drug development, a historical literature knowledge base of predominantly male studies may leave the exercise field vulnerable to overlooking potentially key biological differences in males and females that may be important to consider in prescribing exercise (e.g., how exercise responses may differ between sexes and whether there are optimal approaches to consider for females that differ from conventional approaches that are based on male physiology). Thus, this review will discuss anatomical, physiological, and skeletal muscle molecular differences that may contribute to sex differences in exercise responses, as well as clinical considerations based on this knowledge in athletic and general populations over the continuum of age. Finally, this review summarizes the current gaps in knowledge, highlights the areas ripe for future research, and considerations for sex-cognizant research in exercise fields.
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Affiliation(s)
- Samia M. O'Bryan
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Kathleen R. Connor
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Devin J. Drummer
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Kaleen M. Lavin
- The Florida Institute for Human and Machine Cognition, Pensacola, FL, United States
| | - Marcas M. Bamman
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
- The Florida Institute for Human and Machine Cognition, Pensacola, FL, United States
- *Correspondence: Marcas M. Bamman
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Middleton K, Vickery-Howe D, Dascombe B, Clarke A, Wheat J, McClelland J, Drain J. Mechanical Differences between Men and Women during Overground Load Carriage at Self-Selected Walking Speeds. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19073927. [PMID: 35409609 PMCID: PMC8997774 DOI: 10.3390/ijerph19073927] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/07/2022] [Accepted: 03/21/2022] [Indexed: 11/22/2022]
Abstract
Few studies have directly compared physical responses to relative loading strategies between men and women during overground walking. This study aimed to compare gait mechanics of men and women during overground load carriage. A total of 30 participants (15 male, 15 female) completed three 10-min walking trials while carrying external loads of 0%, 20% and 40% of body mass at a self-selected walking speed. Lower-body motion and ground reaction forces were collected using a three-dimensional motion capture system and force plates, respectively. Female participants walked with a higher cadence (p = 0.002) and spent less absolute time in stance (p = 0.010) but had similar self-selected walking speed (p = 0.750), which was likely due to the female participants being shorter than the male participants. Except for ankle plantarflexion moments, there were no sex differences in spatiotemporal, kinematic, or kinetic variables (p > 0.05). Increasing loads resulted in significantly lower self-selected walking speed, greater stance time, and changes in all joint kinematics and kinetics across the gait cycle (p < 0.05). In conclusion, there were few differences between sexes in walking mechanics during overground load carriage. The changes identified in this study may inform training programs to increase load carriage performance.
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Affiliation(s)
- Kane Middleton
- Discipline of Sport and Exercise Science, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora 3086, Australia; (D.V.-H.); (A.C.)
- Correspondence:
| | - Danielle Vickery-Howe
- Discipline of Sport and Exercise Science, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora 3086, Australia; (D.V.-H.); (A.C.)
| | - Ben Dascombe
- Applied Sport Science and Exercise Testing Laboratory, School of Life and Environmental Sciences, University of Newcastle, Ourimbah 2258, Australia;
| | - Anthea Clarke
- Discipline of Sport and Exercise Science, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora 3086, Australia; (D.V.-H.); (A.C.)
| | - Jon Wheat
- Academy of Sport and Physical Activity, Sheffield Hallam University, Sheffield S10 2BP, UK;
| | - Jodie McClelland
- Discipline of Physiotherapy, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora 3086, Australia;
| | - Jace Drain
- Land Division, Defence Science and Technology Group, Fishermans Bend 3207, Australia;
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Gaffney CJ, Cunnington J, Rattley K, Wrench E, Dyche C, Bampouras TM. Weighted vests in CrossFit increase physiological stress during walking and running without changes in spatiotemporal gait parameters. ERGONOMICS 2022; 65:147-158. [PMID: 34319864 DOI: 10.1080/00140139.2021.1961876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
This study quantified the physiological and biomechanical effects of the 20 lb (9.07 kg, males) and 14 lb (6.35 kg, females) weighted vest used in CrossFit, and whether they were predisposed to injury. Twenty subjects (10 males, 10 females) undertook walking (0%, 5% and 10% gradient) and running trials in two randomised study visits (weighted vest/no weighted vest). Physiological demand during walking was increased with the vest at 10% but not 5% or 0% with no change in gait variables. In the running trial, the weighted vest increased oxygen uptake (males; females) (+0.22L/min, p < 0.01; +0.07 L/min, p < 0.05), heart rate (+11bpm, p < 0.01; +11bpm, p < 0.05), carbohydrate oxidation (+0.6 g/min, p < 0.001; +0.2 g/min, p < 0.01), and energy expenditure (+3.8 kJ/min, p < 0.001; +1.5 kJ/min, p < 0.05) whilst blood lactate was increased only in males (+0.6 mmol/L, p < 0.05). There was no change in stride length or frequency. Weighted vest training increases physiological stress and carbohydrate oxidation without affecting measured gait parameters. Practitioner summary: We examined the effect of weighted vest training prescribed in CrossFit (20 lb/9.07 kg, males and 14 lb/6.35 kg, females) in a randomised controlled trial. We found that physiological stress is increased in both sexes, although three-fold greater in males, but with no change in biomechanical gait that predisposes to lower-limb injury.
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Affiliation(s)
- Christopher J Gaffney
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
| | - Jack Cunnington
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
| | - Kate Rattley
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
- Biomedical and Life Sciences, Lancaster University, Lancaster, UK
| | - Elizabeth Wrench
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
- Biomedical and Life Sciences, Lancaster University, Lancaster, UK
| | - Chloe Dyche
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
- Biomedical and Life Sciences, Lancaster University, Lancaster, UK
| | - Theodoros M Bampouras
- Human Performance Laboratory, Lancaster Medical School, Lancaster University, Lancaster, UK
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